Anaerobic curing compositions and process for preparing same

Details Anaerobic curing compositions and process for preparing same Anaerobic curing compositions and process for preparing same

C - Chemistry, Metallurgy

08

F

402/1, 402/196,

C08F 4/32 (2006.01) C09J 4/00 (2006.01)

Patent

CA 1131397

ABSTRACT OF THE DISCLOSURE Improved storage-stable anaerobic curing adhesive compositions useful as anaerobic adhesives and sealants are prepared by first mixing polymerizable acrylate ester monomer, an inhibitor for free radical polymerization, a chelator, and at least an effective amount of and accelerator system consisting of an N-substituted sulfonamide and an aromatic tertiary amine. The resultant homogeneous mixture is thereafter maintained at a temperature of at least about 20°C. for a period of time sufficient to provide the composition with anaerobic curing properties and a specified minimum amount of active oxygen. In one embodiment, the mixture is stirred at a temperature of 45-80°C. for 10-30 hours. In another embodiment, the mixture is maintained at an elevated temperature without stirring.

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